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dinesh chitlangia <dchitlangia@cloudera.com> in hadoop

HDFS-14414. Clean up findbugs warning in branch-2. Contributed by Dinesh Chitlangia.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

(cherry picked from commit 66ac00312886efe350745b0b5077a4c89b3c78c3)

(cherry picked from commit 64e985f54f7a11d52e3d974e4fedcd43e38d0600)

HDFS-14414. Clean up findbugs warning in branch-2. Contributed by Dinesh Chitlangia.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

HDFS-14414. Clean up findbugs warning in branch-2. Contributed by Dinesh Chitlangia.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

(cherry picked from commit 66ac00312886efe350745b0b5077a4c89b3c78c3)

HADOOP-16075. Upgrade checkstyle version to 8.16.

Contributed by Dinesh Chitlangia.

(cherry picked from commit 47d6b9bb7f6c3efb9681f8228df356cc668fe0d3)

HADOOP-16075. Upgrade checkstyle version to 8.16.

Contributed by Dinesh Chitlangia.

HDFS-14228. Incorrect getSnapshottableDirListing() javadoc. Contributed by Dinesh Chitlangia.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

(cherry picked from commit 45caeee6cfcf1ae3355cd880402159cf31e94a8a)

HDFS-14228. Incorrect getSnapshottableDirListing() javadoc. Contributed by Dinesh Chitlangia.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

(cherry picked from commit 45caeee6cfcf1ae3355cd880402159cf31e94a8a)

(cherry picked from commit eb77e60163e318ca42548e134fe79dba7289fdc6)

HDFS-14228. Incorrect getSnapshottableDirListing() javadoc. Contributed by Dinesh Chitlangia.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

HDFS-14228. Incorrect getSnapshottableDirListing() javadoc. Contributed by Dinesh Chitlangia.

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>

(cherry picked from commit 45caeee6cfcf1ae3355cd880402159cf31e94a8a)

(cherry picked from commit eb77e60163e318ca42548e134fe79dba7289fdc6)

(cherry picked from commit b63941516f78e0d6e22ecc629fc82b16fd17ad87)